Negative exchange rates are allowed

[nus-se-bot]

As in the image above, you can see an exchange rate of -1 is allowed by the system and is reflected in the amount spent as well. Maybe the system should disallow users from using values that are illogical like negatives for exchange rates

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_{[original: nus-cs2113-AY2122S1/pe-interim#1970] [original labels: severity.Medium type.FunctionalityBug]}

[yeezao]

Team's Response

deliberate design decision - understand that some users may prefer seeing the amount deducted as opposed to a positive number, thus we provide flexibility.

Downgraded to Low - use cases of negative exchange rates will likely be rare.

Duplicate status (if any):

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